View Compilation Error

0_0_15320987_18482.cpp: In function 'int main()':
0_0_15320987_18482.cpp:9:49: error: 'str' was not declared in this scope
         for(int i = 1; i <= n; ++i) scanf("%s", str[i]);
                                                 ^
0_0_15320987_18482.cpp:13:27: error: 'str' was not declared in this scope
                 if(strstr(str[i], str[j]) != NULL) continue;
                           ^